I remember trying out this great piece of software some time ago and thinking what a great idea it is to be able to write anything in the old fashioned way, distraction free! The black screen, green text combo is the most stress free way of writing as far as I am concerned. Even this piece of text, I have written it in Wr! It is just sooooo relaxing to the eyes, that when you switch back to the classic white on black, you feel like the light is trying to blast through your eyes!
Anyway, if you have a $25 to spare, I highly recommend it.